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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2593) CQL: Errors when running unqualified "select column" statement (no where clause)
Date Tue, 03 May 2011 16:21:03 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13028293#comment-13028293
] 

Jonathan Ellis commented on CASSANDRA-2593:
-------------------------------------------

bq. The thing is that when you do "select name from users" and only few of the rows have a
"name" column, cqlsh will output all other keys as empty.

Right. (And this part, at least, *is* intuitive to someone coming from SQL: if I have a null
column, I still want to see the row included.)

> CQL: Errors when running unqualified "select column" statement (no where clause) 
> ---------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-2593
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2593
>             Project: Cassandra
>          Issue Type: Bug
>          Components: API
>    Affects Versions: 0.8 beta 1
>            Reporter: Cathy Daw
>            Assignee: Pavel Yaskevich
>            Priority: Minor
>              Labels: cql
>             Fix For: 0.8.0 beta 2
>
>         Attachments: CASSANDRA-2593.patch
>
>
> *Seed Data*
> {code}
> CREATE KEYSPACE cqldb with strategy_class = 'org.apache.cassandra.locator.SimpleStrategy'
and strategy_options:replication_factor=2;
> USE cqldb;
> CREATE COLUMNFAMILY users (KEY varchar PRIMARY KEY, password varchar, gender varchar,
session_token varchar, state varchar, birth_year bigint);
> INSERT INTO users (KEY, password) VALUES ('user0', 'ch@ngem3');
> INSERT INTO users (KEY, password, gender, state, birth_year) VALUES ('user1', 'ch@ngem3a',
'f', 'TX', '1968');
> INSERT INTO users (KEY, password) VALUES ('user2', 'ch@ngem3b');
> INSERT INTO users (KEY, password) VALUES ('user3', 'ch@ngem3c');
> {code}
> *Query #1 - select varchar column*
> {code}
> cqlsh> select state from users;
> u'user1' | u'state',u'TX'
> Exception: 'NoneType' object has no attribute 'decode'
> cqlsh> select state from users where KEY='user1';
> u'user1' | u'state',u'TX'
> {code}
> *Query #2 - select bigint column*
> {code}
> cqlsh> select birth_year from users;
> Exception: unpack requires a string argument of length 8
> cqlsh> select birth_year from users where KEY='user1';
> u'user1' | u'birth_year',1968
> {code}
> *A simple 'SELECT *' with no WHERE clause works fine*
> {code}
> cqlsh> select * from users;
> u'user1' | u'birth_year',1968 | u'gender',u'f' | u'password',u'ch@ngem3a' | u'state',u'TX'
> u'user0' | u'password',u'ch@ngem3'
> u'user3' | u'password',u'ch@ngem3c'
> u'user2' | u'password',u'ch@ngem3b'
> {code}

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